Scanning electron microscopic observation of the external morphology of Dermatophagoides farinae at different developmental stages
10.16250/j.32.1374.2021172
- VernacularTitle:粉尘螨各发育阶段外部形态扫描电镜观察
- Author:
Xiao-dong ZHAN
1
,
2
,
3
;
Run YAO
1
,
3
;
Mei-qing WANG
1
;
Feng JIANG
1
;
Wei GUO
1
;
Fei-fan TANG
1
;
Lan WANG
1
;
Chao-pin LI
1
Author Information
1. Department of Medical Parasitology, Wannan Medical College, Wuhu, Anhui 241002, China
2. Anhui Province Key Laboratory of Active Biological Macro-molecules Research, Wannan Medical College, Wuhu, Anhui 241002, China
3. Co-first authors
- Publication Type:Journal Article
- Keywords:
Dermatophagoides farinae;
Scanning electron microscopy;
Morphological characteristic
- From:
Chinese Journal of Schistosomiasis Control
2022;34(2):179-182
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the morphological characteristics of Dermatophagoides farinae at different developmental stages. Methods The cultured D. farinae was isolated, and the external morphological features of mites at various developmental stages were observed using scanning electron microscopy (SEM), including egg, larva, nymph and adult stages. Results The D. farinae egg appeared a long oval shape, and the larval mites had three pairs of legs. The nymph had four pairs of legs and underdeveloped genital pores containing genital setae and anal setae, and adult mites appeared long and oval in shape, with decorative patterns on epidermis, and had four pairs of legs. In male adult mites, remarkable thickening of the leg I and thicker and longer leg III than the leg IV were seen, and ventral genital regions were found between the basal segments of legs III and IV; the anus was surrounded by a circular peri-anal ring, with a pair of anal suckers and anal setae within the ring. In the female adult mites, slender legs III and IV with an equal length were seen, and a “λ-shape” genital hole was observed on the ventral surface, with a crescent-like genital plate in the anterior part, and the anus appeared a longitudinal slit. Conclusions An SEM observation of the external morphology of D. farinae provides understandings of the morphological characteristics of D. farinae, which is of great significance for the classification and identification.
